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andriy [413]
3 years ago
9

Your mother takes you to your grandparents’ house for dinner. She drives 60 minutes at a constant speed of 40 miles per hour. Sh

e reaches the highway, quickly speeds up, and drives for another 30 minutes at a constant speed of 70 miles per hour. (Remember, change your minutes into HOURS before doing any computing!)
Mathematics
1 answer:
SIZIF [17.4K]3 years ago
5 0

Answer:

A!

Step-by-step explanation:

i looked it up

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5. How many solutions does this system of equations have?
Diano4ka-milaya [45]

Answer:

\text{\boxed{\sf{D. \ No\  solution}}}

Step-by-step explanation:

Isolate the term of x and y from one side of the equation.

<h3>y=-4x-9 and y=-4x-1</h3>

First, you have to substitute of y=-4x-1.

\Longrightarrow: \sf{[-4x-1=-4x-9]}

<u>Add by 4x from both sides.</u>

\Longrightarrow: \sf{-4x-1+4x=-4x-9+4x}

<u>Solve.</u>

\Rightarrow:\sf{-1=-9}\\\\\Rightarrow: \sf{(-9)-(-1)=-9+1=-8}\\\\\Rightarrow: \sf{8=0}

  • <u>Therefore, the correct answer is "D. No solution".</u>

I hope this helps. Let me know if you have any questions.

8 0
2 years ago
Simplify each expression. Use positive exponents. <br> A^4b^-3<br> ab^-2
choli [55]
\dfrac{a^4b^{-3}}{ab^{-2}}

= {a^{4-1}b^{-3+2}}

= {a^{3}b^{-1}}

= \dfrac{a^3}{b}


6 0
3 years ago
Read 2 more answers
Need some help on vertical adjacent complementary angles (algebraic)
dusya [7]

Step-by-step explanation:

(2c + 8) + (6c - 6) = 90 \\ 8c + 2 = 90 \\ 8c = 88 \\ c =  \frac{88}{8}  = 11

6 0
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9 = v + 4 v + 12<br><br> help me with this
True [87]

Answer:

v=-3/5

Step-by-step explanation:

9 = v + 4 v + 12

=>5v=9-12

=>v=-3/5

8 0
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20 didn't do it for this one.
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